9
2
6
1
1
4
9
9
1
8
4
2
3
5
4
3
9
2
5
6
7
5
2
7
3
6
9
4
7
4
9
5
2
3
6
9
3
8
7
3
7
1
4
6
3

This Sudoku Puzzle has 37 steps and it is solved using undefined, Naked Single, Full House, Hidden Single techniques.

Try To Solve This Puzzle

## Solution Steps:

1. X-Wing: 8 r57 c59 => r139c5,r49c9<>8
2. Row 3 / Column 5 → 7 (Naked Single)
3. Row 3 / Column 1 → 8 (Full House)
4. Row 1 / Column 2 → 4 (Naked Single)
5. Row 6 / Column 1 → 1 (Naked Single)
6. Row 6 / Column 2 → 8 (Full House)
7. Row 8 / Column 2 → 1 (Full House)
8. Row 9 / Column 1 → 5 (Naked Single)
9. Row 1 / Column 1 → 7 (Full House)
10. Row 7 / Column 3 → 2 (Naked Single)
11. Row 9 / Column 3 → 4 (Full House)
12. Row 9 / Column 8 → 8 (Naked Single)
13. Row 1 / Column 9 → 6 (Naked Single)
14. Row 2 / Column 8 → 7 (Full House)
15. Row 7 / Column 9 → 8 (Naked Single)
16. Row 4 / Column 8 → 6 (Naked Single)
17. Row 4 / Column 9 → 1 (Full House)
18. Row 8 / Column 8 → 5 (Full House)
19. Row 5 / Column 9 → 1 (Full House)
20. Row 4 / Column 6 → 8 (Full House)
21. Row 5 / Column 5 → 8 (Full House)
22. Row 7 / Column 5 → 5 (Naked Single)
23. Row 8 / Column 5 → 4 (Naked Single)
24. Row 8 / Column 6 → 2 (Naked Single)
25. Row 1 / Column 5 → 3 (Naked Single)
26. Row 1 / Column 6 → 5 (Naked Single)
27. Row 8 / Column 4 → 9 (Naked Single)
28. Row 8 / Column 9 → 7 (Full House)
29. Row 9 / Column 4 → 9 (Naked Single)
30. Row 1 / Column 3 → 5 (Naked Single)
31. Row 2 / Column 5 → 6 (Naked Single)
32. Row 2 / Column 6 → 6 (Naked Single)
33. Row 9 / Column 9 → 2 (Naked Single)
34. Row 2 / Column 3 → 3 (Naked Single)
35. Row 9 / Column 5 → 1 (Naked Single)
36. Row 9 / Column 6 → 1 (Naked Single)
37. Row 1 / Column 4 → 8 (Hidden Single)